Home Page

Cart, contains 0 items

When autocomplete results are available use up and down arrows to review and enter to select. Touch device users, explore by touch or with swipe gestures.
Expert Help
Earn Rewards
  • Just In
  • Learn

Tyrant Spherical Helmet

4.666666666666667 out of 5 stars
3 Reviews
$95.97 - $169.95
Up to 40% off
Color:Matte Citron


Size Chart


Why We Like The Tyrant MIPS Helmet

From backyard jump jams, to sessioning your favorite piece of singletrack, Giro's new Tyrant is designed to meet the needs of today's progressive trail riders. Though the style is reminiscent of old-school BMX helmets, it comes equipped with modern safety features like Spherical MIPS and progressive foam layering that handles both high- and low-speed impacts.


  • Open-face helmet with added coverage for rowdy trails
  • Two-piece shell brings durability without excess weight
  • MIPS Spherical redirects impact energy during a crash
  • EPS foam outer layer protects against high-speed impacts
  • Softer EPP inner layer takes care of low-speed impacts
  • 14 vents with internal channels to keep your head cool
  • Adjustable Roc Loc fit system enhances comfort and stability
  • Ages 5 and older
  • Item #GIRZ31M
adjustable, tool-free bolt-on
Complies with U.S. CPSC Safety Standard for Bicycle Helmets for Persons Age 5 and Older, CE EN1078
Fit Adjustment
Roc Loc Air
14 vents with internal channeling, Stack Ventilation at brow line
Manufacturer Warranty
1 year
Claimed Weight
[small] 1lb 3oz (530g)
Shell Material
in-mold polycarbonate

Overall Rating

4.5 based on 3 ratings

Review Summary

1 Stars - 0 reviews
2 Stars - 0 reviews
3 Stars - 0 reviews
4 Stars - 1 reviews
5 Stars - 2 reviews

Fits True To Size

Screen reader users: the following list provides a visual scale to illustrate the product fit. Please refer to the heading above for the fit type in text.
Runs smallTrue to sizeRuns large

What do you think about this product?


Selecting an option will reload the available reviews on the page
5 out of 5 stars

November 5, 2023

Great helmet

I've used it several times

Great helmet; very comfortable, nice design, fits well, excellent protection

Matthew C

Originally reviewed on Backcountry.com

4 out of 5 stars

December 4, 2022

Great helmet NOT for long oval heads

I returned this product before using it

I was stoked to get something like this for better protection than the average cross country style MTB helmet. However it doesn’t fit my long oval head. Nice quality though, and I like the full adjustment visor.

Moses G

Originally reviewed on Backcountry.com

5 out of 5 stars

May 8, 2020

The Only Helmet You'll Ever Need

I've used it several times

There is plenty of venting; its light enough, and the vented ear coverage on the sides should be on all helmets! The strap has a quick-click connection making it easy and simple to strap in. Visor is adjustable. The ear coverage does not interfere with hearing. This helmet is suitable for mountain biking, gravel roads and even road riding. I have been mountain biking for over 30 years, and until GIro reworked the Switchblade, I wore an old-school BMX over the ears solid helmet, and have never overheated.I still wear it when its cool or cold. The Tyrant is only the 2nd actual mtn biking helmet I have owned. Better coverage than the Fox Dropframe. Get this Helmet!

Don F

Originally reviewed on Backcountry.com